import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:music_center/music_center.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  final _musicCenterPlugin = MusicCenter();

  bool _isMusicPlaying = false;


  @override
  void initState() {
    super.initState();
    initPlatformState();
    WidgetsBinding.instance.addPostFrameCallback((_){
      if(mounted){

        _updateIsMusicOn();
      }

    });
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion =
          await _musicCenterPlugin.getPlatformVersion() ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  void _updateIsMusicOn(){
    _musicCenterPlugin.isMusicOn().then((value) {
      setState(() {
        _isMusicPlaying = value;
      });
    });
  }

  void _playOrPause() async{
   await _musicCenterPlugin.switchMusicOn();
   await Future.delayed(const Duration(seconds: 1));
   _updateIsMusicOn();
  }

  void _next() async{
    await _musicCenterPlugin.nextMusic();
    await Future.delayed(const Duration(seconds: 1));
    _updateIsMusicOn();
  }

  void _last() async{
    await _musicCenterPlugin.lastMusic();
    await Future.delayed(const Duration(seconds: 1));
    _updateIsMusicOn();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text("is music playing: $_isMusicPlaying"),
              Padding(
                padding: const EdgeInsets.symmetric(vertical: 40.0),
                child: StreamBuilder(stream: _musicCenterPlugin.musicOn, builder: (ctx, snapshot){
                  return Text("musicOn Stream, current is music playing: ${snapshot.hasData ? snapshot.data! : false}");
                }),
              ),
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceAround,
                children: [
                  TextButton(onPressed: _playOrPause, child: const Text("play/pause")),
                  TextButton(onPressed: _next, child: const Text("next")),
                  TextButton(onPressed: _last, child: const Text("last")),
                ],
              ),
              Text('Running on: $_platformVersion\n'),
            ],
          ),
        ),
      ),
    );
  }
}
